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Java Tip 38: The trick to "Iterator Observers"

Factor out common code and make your Iterators observable

By Philip Bishop, JavaWorld.com, 09/01/97

Page 4 of 4

• When more than one object is updated by the elements retrieved from an Iterator.
  
  
• When the same iterator client code is duplicated throughout a system.
  
  
• When encapsulating different Iterator syntax in adaptors that provide an Iterate() method.
  
  
• When encapsulating access to queries on persistent data or from remote objects.